http://www.ustream.tv/recorded/21133019 Titan, Saturn's largest moon and the only moon in the solar system enshrouded in a thick atmosphere, has fascinated observers since its discovery in 1655. We'll begin with the discovery of Titan by Christiaan Huygens and quickly cover all the major scientific discoveries about this intriguing moon right up to the amazing results that are flowing back now from the Cassini-Huygens Mission.